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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/** @file
udp builtin server
*/
#include <vnet/udp/udp.h>
#include <vnet/session/session.h>
#include <vnet/session/application_interface.h>
/** per-worker built-in server copy buffers */
u8 **copy_buffers;
static int
builtin_session_create_callback (stream_session_t * s)
{
/* Simple version: declare session ready-to-go... */
s->session_state = SESSION_STATE_READY;
return 0;
}
static void
builtin_session_disconnect_callback (stream_session_t * s)
{
stream_session_disconnect (s);
}
static int
builtin_server_rx_callback (stream_session_t * s)
{
svm_fifo_t *rx_fifo, *tx_fifo;
u32 this_transfer;
int actual_transfer;
u8 *my_copy_buffer;
session_fifo_event_t evt;
unix_shared_memory_queue_t *q;
my_copy_buffer = copy_buffers[s->thread_index];
rx_fifo = s->server_rx_fifo;
tx_fifo = s->server_tx_fifo;
this_transfer = svm_fifo_max_enqueue (tx_fifo)
< svm_fifo_max_dequeue (rx_fifo) ?
svm_fifo_max_enqueue (tx_fifo) : svm_fifo_max_dequeue (rx_fifo);
vec_validate (my_copy_buffer, this_transfer - 1);
_vec_len (my_copy_buffer) = this_transfer;
actual_transfer = svm_fifo_dequeue_nowait (rx_fifo, 0, this_transfer,
my_copy_buffer);
ASSERT (actual_transfer == this_transfer);
actual_transfer = svm_fifo_enqueue_nowait (tx_fifo, 0, this_transfer,
my_copy_buffer);
copy_buffers[s->thread_index] = my_copy_buffer;
/* Fabricate TX event, send to ourselves */
evt.fifo = tx_fifo;
evt.event_type = FIFO_EVENT_SERVER_TX;
/* $$$$ for event logging */
evt.enqueue_length = actual_transfer;
evt.event_id = 0;
q = session_manager_get_vpp_event_queue (s->thread_index);
unix_shared_memory_queue_add (q, (u8 *) & evt, 0 /* do wait for mutex */ );
return 0;
}
/* *INDENT-OFF* */
static session_cb_vft_t builtin_server = {
.session_accept_callback = builtin_session_create_callback,
.session_disconnect_callback = builtin_session_disconnect_callback,
.builtin_server_rx_callback = builtin_server_rx_callback
};
/* *INDENT-ON* */
static int
bind_builtin_uri_server (u8 * uri)
{
vnet_bind_args_t _a, *a = &_a;
char segment_name[128];
u32 segment_name_length;
int rv;
u64 options[16];
segment_name_length = ARRAY_LEN (segment_name);
memset (a, 0, sizeof (*a));
memset (options, 0, sizeof (options));
a->uri = (char *) uri;
a->api_client_index = ~0; /* built-in server */
a->segment_name = segment_name;
a->segment_name_length = segment_name_length;
a->session_cb_vft = &builtin_server;
options[SESSION_OPTIONS_ACCEPT_COOKIE] = 0x12345678;
options[SESSION_OPTIONS_SEGMENT_SIZE] = (2 << 30); /*$$$$ config / arg */
a->options = options;
rv = vnet_bind_uri (a);
return rv;
}
static int
unbind_builtin_uri_server (u8 * uri)
{
int rv;
rv = vnet_unbind_uri ((char *) uri, ~0 /* client_index */ );
return rv;
}
static clib_error_t *
builtin_server_init (vlib_main_t * vm)
{
vlib_thread_main_t *vtm = vlib_get_thread_main ();
u32 num_threads;
num_threads = 1 /* main thread */ + vtm->n_threads;
vec_validate (copy_buffers, num_threads - 1);
return 0;
}
VLIB_INIT_FUNCTION (builtin_server_init);
static clib_error_t *
builtin_uri_bind_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
u8 *uri = 0;
int rv;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "uri %s", &uri))
;
else
break;
}
if (uri == 0)
return clib_error_return (0, "uri to bind not specified...");
rv = bind_builtin_uri_server (uri);
vec_free (uri);
switch (rv)
{
case 0:
break;
default:
return clib_error_return (0, "bind_uri_server returned %d", rv);
break;
}
return 0;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (builtin_uri_bind_command, static) =
{
.path = "builtin uri bind",
.short_help = "builtin uri bind",
.function = builtin_uri_bind_command_fn,
};
/* *INDENT-ON* */
static clib_error_t *
builtin_uri_unbind_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
u8 *uri = 0;
int rv;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "uri %s", &uri))
;
else
break;
}
if (uri == 0)
return clib_error_return (0, "uri to unbind not specified...");
rv = unbind_builtin_uri_server (uri);
vec_free (uri);
switch (rv)
{
case 0:
break;
default:
return clib_error_return (0, "unbind_uri_server returned %d", rv);
break;
}
return 0;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (builtin_uri_unbind_command, static) =
{
.path = "builtin uri unbind",
.short_help = "builtin uri unbind",
.function = builtin_uri_unbind_command_fn,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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